Proudly made in the USA of .925 Sterling Silver. All stones are CZ. This is an OPEN BACK ring. 12x10mm stone. 13mm overall width of face. Due to the intense labor involved in the manufacture of this product to achieve such a supremely high quality item, we cannot accept any returns. Although these rings can be resized, if you are off by more than 1 entire ring size then it may require that a new ring be made in which case, you will have to order a new ring because these models cannot be returned. Please have your finger sized correctly by a professional in USA sizing standards.